Question

The radius of ag+ ion is 126 pm while that of i– ion is 216 pm. the co-ordination number of ag in agi is

Answer 1

radius ratio Rc/Ra=126/216=0.583 therefore Co.no=6 (0.414-0.742 co.no=6)

Answer 2

Answer:

The co-ordination number of Ag in AgI is 6.

Explanation:

Radius ratio $\=\frac{\text{Radius of the cation}r_+}{\text{Radius of the anion}r_-}$

Radius of $Ag^+$ ion = 126 pm

Radius of $I^-$ ion = 216 pm.

Radius ratio = $\frac{r_+}{r_-}=\frac{126 pm}{216 pm}=0.5833$

The ratio comes in the range of 0.414 to 0.732 of octahedral structural arrangement which means the coordination number is 6.

The co-ordination number of Ag in AgI is 6.